US 11,717,487 B2
Enteric coating composition, solid preparation and method for producing solid preparation
Shogo Warashina, Niigata (JP); and Yasuyuki Hirama, Niigata (JP)
Assigned to Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Filed by Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Filed on Apr. 1, 2020, as Appl. No. 16/837,831.
Claims priority of application No. 2019-071880 (JP), filed on Apr. 4, 2019.
Prior Publication US 2020/0315977 A1, Oct. 8, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 9/50 (2006.01); A61K 9/28 (2006.01); A61K 9/48 (2006.01); A61K 47/10 (2017.01)
CPC A61K 9/5047 (2013.01) [A61K 47/10 (2013.01)] 7 Claims
 
1. An enteric coating composition comprising: hypromellose acetate succinate having a molar substitution of hydroxypropoxy groups from 0.40 to 0.85, a ratio of a degree of substitution of acetyl groups to the molar substitution of hydroxypropoxy groups from 0.70 to 1.60 , and a degree of substitution of succinyl groups of from 0.15 to 0.45, and water.